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Quick help loading cyanogen on a 4.2 device

Howdy folks, it appears that I've run into a bit of a hurdle playing with my transformer.
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Problem:
Stuck Boot (static "ASUS" logo, with nvidia logo in bottom right and "unlocked" in top left)
-(rebooting into bootloader and recovery is possible)
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Background Steps:
1. device got the 4.2.2 OTA from ASUS and is running the 10.6 bootloader
2.performed 4.2 unlock as per ASUS instructions
3.loaded TWRP 2.5 (4.2 version)
4.did a full wipe within TWRP (except SD)
5.installed stable release 10.0.0 =
6. wiped cache and dalvik
7. rebooted
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I figured this was a problem with the kernel (similar symptoms before on previous devices) so i went into fastboot and loaded the boot.blob from the cm zip. - It had no effect!
I then wiped and tried again with 10.1 (nightly), again updating kernel - It had no effect!
Getting nervous, i flashed a rom based on stock 4.2 (kernel flash was required) -It's working but not what I want to end up with.
-Can you folks help me out?
Any help is appreciated

As far as I know the this [OFFICIAL][4.2.2][TF300T][NIGHTLIES] CyanogenMod 10.1 for TF300T does not work with the 4.2 bootloaders, even though it's 4.2.2 it needs a 4.1 bootloader like 10.4.2.20.
There is an experimental build for the 4.2 bootloaders here [ROM][4.2.2][CyanogenMod 10.1 Unofficial][TF300T(G) with BL 4.2][2013-05-09], if your using twrp 2.5.0.0-4.2 you should have JB 10.6.1.15.3 bootloader as twrp 2.5.0.0-4.2 on JB 10.6.1.8 has a split-screen issue.

As far as I know, the official CM10 and CM10.1 (including nightlies) are still not compatible with the ASUS new 4.2 Boot loader. You have to wait a little while for the official CM10.1 maintainer to catch up.
However, there is an unofficial CM10.1 that can work with your current 4.2 bootloader, look here: http://forum.xda-developers.com/showthread.php?t=2252990

would you recommend downgrading to 4.1 to use the stable release, or should is it safer to just stay with what i got til they decide to make an official cm release that'll work with it?

n00b1c1d3 said:
would you recommend downgrading to 4.1 to use the stable release, or should is it safer to just stay with what i got til they decide to make an official cm release that'll work with it?
Click to expand...
Click to collapse
It is safer to stay. Messing with recovery, fastboot and bootloaders is risky business. Although, it may work, there is also a chance you might brick your tablet when done incorrectly. Not that I doubt your abilities. It's just that we are seeing an alarming rate of bricked TF300T being reported in the forum. Better wait for a much safer version of TWRP recovery.
EDIT: However, if you have NVFlash backup of your tablet, downgrading and bricking won't be much of a problem.

Roger, i'll stay with 4.2, maybe i'll try that experimental 4.2 one.

[Q] 4.0.3 to 4.2 Upgrade Clarification

So I've been running the stock 4.0.3 Android on my TF300T for a very long time. at one point Idownloaded the asus provided unlocking tool, unlocked the device and installed CWM 5.5 and IIRC rooted the device in prep to run a custom ROM. I never got around to doing this but now I am ready to get this thing updated to the latest firmware ASUS provides ( V10.6.1.15.3)
There seems to be a mess of issues with the 4.2 bootloaders and such. So being a complete newbie to the world of Android I want to make sure I do not brick my TF300T or ruin it in any way.
As I understand... I can simply download the firmware. Unzip the .zip file to my SD card, boot into the currently installed CWM, install the new 4.2 update and all I will need to do in install an updated recovery for 4.2 afterwards correct?
EDIT: My plan is to use This guide >> http://forum.xda-developers.com/showthread.php?t=2187982 << I just want clarification that I can update to the TeamWin recovery after installing 4.2

Philldoe said:
So I've been running the stock 4.0.3 Android on my TF300T for a very long time. at one point Idownloaded the asus provided unlocking tool, unlocked the device and installed CWM 5.5 and IIRC rooted the device in prep to run a custom ROM. I never got around to doing this but now I am ready to get this thing updated to the latest firmware ASUS provides ( V10.6.1.15.3)
There seems to be a mess of issues with the 4.2 bootloaders and such. So being a complete newbie to the world of Android I want to make sure I do not brick my TF300T or ruin it in any way.
As I understand... I can simply download the firmware. Unzip the .zip file to my SD card, boot into the currently installed CWM, install the new 4.2 update and all I will need to do in install an updated recovery for 4.2 afterwards correct?
EDIT: My plan is to use This guide >> http://forum.xda-developers.com/showthread.php?t=2187982 << I just want clarification that I can update to the TeamWin recovery after installing 4.2
Click to expand...
Click to collapse
Make sure you look into nvflash before you go updating to later firmwares because once you leave ICS you'll lose the option. Im not sure how many people here have access to nvflash because they brought their tf300t with JB pre-installed and dont have the chance to use nvflash as the exploit used is patched. But i was lucky and and took advantage of it while i was still on ICS, i would have bricked my tf300t 10 times over if it wernt for nvflash.
It makes your tf300t unbrickable, and lets you flash back to 4.0.1 bootloader if you have issues with 4.2:good:
And to answer your question yes you can update the 4.2 version of twrp AFTER the update with fastboot

[Q] Cannot flash custom rom

I have a asus tf300t running 4.2.1 with unlocked bootloader and root. I am running twrp v2.5.0.0 and I have already made backups of my apps. I am trying to install a custom rom. Preferably PACman rom but at this point any will do. When I try to flash the rom it go through the whole process then reboots but does not get past the asus splash screen.
What is the problem? Is it that the new bootloader does not accept any custom roms, if so how do I downgrade to 4.1? Otherwise I am open to any advice.

Holyman8388 said:
I have a asus tf300t running 4.2.1 with unlocked bootloader and root. I am running twrp v2.5.0.0 and I have already made backups of my apps. I am trying to install a custom rom. Preferably PACman rom but at this point any will do. When I try to flash the rom it go through the whole process then reboots but does not get past the asus splash screen.
What is the problem? Is it that the new bootloader does not accept any custom roms, if so how do I downgrade to 4.1? Otherwise I am open to any advice.
Click to expand...
Click to collapse
You must be on Jelly Bean 4.2.1
with the Asus Stock bootloader 10.6.1.8 and TWRP Recovery patched 2.4.4.0
or
Bootloader 10.1.15.3 and TWRP patched 2.5.0.0
You will find all versions of Stock firmwares and Stock kernels here
And the TWRP recoveries here

philos64 said:
You must be on Jelly Bean 4.2.1
with the Asus Stock bootloader 10.6.1.8 and TWRP Recovery patched 2.4.4.0
or
Bootloader 10.1.15.3 and TWRP patched 2.5.0.0
You will find all versions of Stock firmwares and Stock kernels here
And the TWRP recoveries here
Click to expand...
Click to collapse
I am currently running the 10.1.15.3 bootloader and TWRP 2.5.0.0, yet it still does not finish flashing the ROM. I even tried to flash a more simple stock based ROM, ie. black beans 8. This did not work either. It went through the twrp flash and restarted but when it got to the ASUS boot up screen it simply stopped. I waited about 10 minutes for it to possibly load however it never did. So I am restored back to my stock and am awaiting any further help.

Holyman8388 said:
I have a asus tf300t running 4.2.1 with unlocked bootloader and root. I am running twrp v2.5.0.0 and I have already made backups of my apps. I am trying to install a custom rom. Preferably PACman rom but at this point any will do. When I try to flash the rom it go through the whole process then reboots but does not get past the asus splash screen.
What is the problem? Is it that the new bootloader does not accept any custom roms, if so how do I downgrade to 4.1? Otherwise I am open to any advice.
Click to expand...
Click to collapse
In the OP for PACman rom it says you must be on android 4.1.1 to flash his rom. You need to pick a rom for your 4.2.1. I am also on 4.2.1 and run CROMI 4.6.6 with no issues. Have also succesfully tried the Energy rom. Read carefully the OP for the rom's you are considering and make sure they are for 4.2.1

Holyman8388 said:
I have a asus tf300t running 4.2.1 with unlocked bootloader and root. I am running twrp v2.5.0.0 and I have already made backups of my apps. I am trying to install a custom rom. Preferably PACman rom but at this point any will do. When I try to flash the rom it go through the whole process then reboots but does not get past the asus splash screen.
What is the problem? Is it that the new bootloader does not accept any custom roms, if so how do I downgrade to 4.1? Otherwise I am open to any advice.
Click to expand...
Click to collapse
I am having the same problem! I am running 4.2.1 and im trying to install blackbean 8 using twrp 2.5.0.0. I factory reset in twrp and wipe cache and dalvic. I then install the the rom and reboot but it will not go past the first boot screen with the tegra logo in the bottom right. It always flashes for a second but then does nothing. I have even tried cm 10.1 and it does the exact same thing. I am still able to restore back to stock. This is my first time flashing a rom so any help would be appreciated!

For the latest [ROM][4.2.2][ OFFICIAL] PAC-man v23.0.0 [OC up to 1.7GHz][New Update 22/06/2013], if you read the installation process, you need to be 4.1.1 and not 4.2.1 and also you need installed custom recovery for JB 4.1 BL !
For the latest [ROM]ASU-JellyBean-Hydro 8 (6/29/13)Liquid Butter..- Tf300 -Official 10.6.1.15.3 Base, you need to be on 4.2.1 and 10.6.15.3 bootloader
and you will see to the changelog:
...not sure if any bootloader will work...
Click to expand...
Click to collapse
Hope it's helpful for you

Bootloop and/or Bricked

Hello,
After a couple of months on cm10.1 on my TF300T 32GB, I wanted to try another rom. I was (and still am) on TWRP v2.2.1.5, and after flashing a new rom (I think it was grimlock) it booted, but would crash after a minute or so of not doing anything. Deciding to flash another rom, I flashed paranoid android and it would never boot anymore. So that is my problem, I am completely stuck, and because I can't boot into android anymore, I can't place any files on my internal SD card to flash.
Is my TF300T beyond repair? Will I have to send it back? I also need some explanation on how Bootloaders/Recoveries/ROMS work on the TF300T, because it's really easy on my Galaxy Nexus but here it's all complicated.
EDIT:
It's also worth mentioning that when starting the tablet while powered off with the onbutton+volumedown it will say that the following bootloader is installed:
"WW_epad-10.4.2.13-20120907" a03

Your tab is not bricked but you are going to need micro sd or mount internal memory via twrp to put roms on your tablet
Sent from my HTC Desire C using xda app-developers app

While as above your tablet isn't bricked, flash the latest version of twrp with fastboot, "fastboot flash recovery *name-of-file*" then move a 4.1 compatible rom over to your tf300 and flash it (id suggest the latest stock firmware from Asus but its up to you)
Its pretty easy on the tf300t, but Asus in their infinite misguided wisdom decided to release a new bootloader with their 4.2 firmware that wasn't compatible with kernels built on prior sources, So now we just have to check if the rom/kernel you are flashing is compatible with the bootloader you're on, 10.4.x.xx is the old bootloader and 10.6.x.xx is the new bootloader, (devs call these bootloaders 4.1 and 4.2 bootloaders because of the versions of android they were released with, the bootloaders themselves are capable of running either 4.1 or 4.2 versions of android.)
Twrp is a recovery and a recovery is a kernel, so if you flash a version of twrp that isn't compatible with your bootloader version, it will not function correctly. Plenty of thread that should point you to the right version.

noahvt said:
Your tab is not bricked but you are going to need micro sd or mount internal memory via twrp to put roms on your tablet
Sent from my HTC Desire C using xda app-developers app
Click to expand...
Click to collapse
JoinTheRealms said:
While as above your tablet isn't bricked, flash the latest version of twrp with fastboot, "fastboot flash recovery *name-of-file*" then move a 4.1 compatible rom over to your tf300 and flash it (id suggest the latest stock firmware from Asus but its up to you)
Its pretty easy on the tf300t, but Asus in their infinite misguided wisdom decided to release a new bootloader with their 4.2 firmware that wasn't compatible with kernels built on prior sources, So now we just have to check if the rom/kernel you are flashing is compatible with the bootloader you're on, 10.4.x.xx is the old bootloader and 10.6.x.xx is the new bootloader, (devs call these bootloaders 4.1 and 4.2 bootloaders because of the versions of android they were released with, the bootloaders themselves are capable of running either 4.1 or 4.2 versions of android.)
Twrp is a recovery and a recovery is a kernel, so if you flash a version of twrp that isn't compatible with your bootloader version, it will not function correctly. Plenty of thread that should point you to the right version.
Click to expand...
Click to collapse
Thank you both. I will try to fix it with the instructions. I am really happy that I don't have to send my tablet for repairs. :fingers-crossed:

I have been on CM 10.1 for sometime but now cannot get anything past the July 6th nightly to boot. Are new CM revisiions only for the 4.2 bootloader?

Any warnings/heads up to offer me? Leaping over many versions...

My TF300T still has the old stock firmware from October 2012 (4.1).
It is unlocked and has TWRP from february 2013.
Now I will be jumping to a current custom firmware (Crombi-kk 4.4).
If I understand correctly, I have to flash the latest STOCK firmware (V10.6.1.27.5 android 4.2) and install the new CWM/TWRP before I can flash a custom firmware.
My main worry is flashing the newest stock rom on my already TWRP/rooted/unlocked TF300T. Will that cause a problem or will the stock firmware wipe everything clean (except for the unlock)?
Also, the unlock utility on Asus's website is made for 4.2 only. When I unlocked my TF300T, it was 4.1. What will happen when I flash the stock 4.2? Will my 4.1 unlock cause problems or will it be wiped, or will it still be effective?

alkizmo said:
My TF300T still has the old stock firmware from October 2012 (4.1).
It is unlocked and has TWRP from february 2013.
Now I will be jumping to a current custom firmware (Crombi-kk 4.4).
If I understand correctly, I have to flash the latest STOCK firmware (V10.6.1.27.5 android 4.2) and install the new CWM/TWRP before I can flash a custom firmware.
My main worry is flashing the newest stock rom on my already TWRP/rooted/unlocked TF300T. Will that cause a problem or will the stock firmware wipe everything clean (except for the unlock)?
Also, the unlock utility on Asus's website is made for 4.2 only. When I unlocked my TF300T, it was 4.1. What will happen when I flash the stock 4.2? Will my 4.1 unlock cause problems or will it be wiped, or will it still be effective?
Click to expand...
Click to collapse
If you would like help with this shoot me an email here [email protected]
We can get you where you need to be and than we can post what we did back here so everyone can see what we did...
Thx Josh

Thanks for your offer. I actually got the green light on the CM 4.4.x Q&A thread.
I read that flashing the CWM for 4.1 would brick your tablet if you had 4.2 installed, so I was worried that flashing 4.2 on top of an existing 4.1 CWM would brick it as well. It turns out it simply removes the CWM entirely. Good times.
Basically what I ended up doing was:
1 - Transfer the latest official TF300T firmware (zip file) onto an SD card.
2 - Start my TF300T with my old (4.1) CWM recovery and select to flash my android with the zip file on the SD card.
3 - The TF300T bootloader stayed unlocked, but the old CWM was gone.
4 - Using ADB: Upload & flash the new CWM Philz Touch
5 - Install/flash the desired custom rom (from within CWM using SD card)
6 - Restore to factory default (from within CWM)
Now I even installed Grimlock's kernel to allow overclocking.
My TF300T has a new life. It is now very much acceptable in terms of speed.